Acacia siculiformis is known as the Dagger Wattle and is a medium, upright shrub with narrow prickly phyllodes and pale yellow flowers. Flowering occurs in spring and early summer. The Dagger Wattle occurs in the Southern and Northern Tablelands of NSW. This is an unusual wattle because it usually grows near watercourses and on wetland margins. When cultivated Acacia siculiformis will also survive and thrive in dry situations. A common plant in Cathedral Rocks National Park, east of Armidale, where it is confined to creek banks. The species has also colonised roadside drains in the Armidale area. Seeds are the accepted method of propagation.